Extremely frustrating. I set up a catalog, all the section headers I want to appear in the TOC are tagged with the same paragraph style, yet it simply refuses to include some of these - all after a certain point in the book. I've looked at everything I can think of to try to see what's different about those items - and nothing. I've searched forums, can't find an answer - maybe because this is such a general question. But there are several reasons why e.g. the gradient annotator might not show up in AI (another thing which has driven me nuts)...hoping somebody can similarly list the main factors that can break a TOC, and hopefully my answer will be in there somewhere.

It's actually not a "book," just a single .indd file. I'm using ID 11.2.0.100 on Windows 7 (I know, but it's my work comp). This started happening after a particular edit, but I couldn't tell you what action caused it - I'd been adding and editing tables, probably copying tables and pasting in new data, etc. This doc is all tables btw, and the items that should be showing up in the TOC are the table headers, all of which have the same paragraph style applied. I've even tried applying a different style and the re-applying the TOC style - it just absolutely refuses to add certain headers to the generated TOC. Looking in the Story Editor, which I've never hitherto used, right now to see if I can figure anything out...

This seems highly unlikely in your case, but check to be sure that you don't have multiple styles with the same name in style groups or with different capitalization. You might want to try this, too: Remove minor corruption by exporting

Ya know what - I had a deadline and it was a short price book, so I just entered the missing entries manually - but then I had to create a new version with just a few edits, and ran into the same issue of course, so I tried exporting to idml and reopened it, and sure enough, the TOC works now. Something got corrupted somewhere. Anyway thanks - that definitely solved the problem.